Valve-refacer



R. BEAN.

VALVE REFACER.

APPLICATION FILED JAN. 28. 1916.

1,330,778. Pal tented Feb. 17,1920.

UNITED srnrns PATENT OFFICE.

ROSCQE BEAN, 0F BEREA, OHIO, ASSIGNOB T0 LIBERTY METAL PRODUCTS COMPANY, OF IBEREA, OHIO, A CORPORATION OF IOWA.

VALVE-REFACER.

Specification of Letters Patent.

Patented Feb. 1'7, 1920.

Application filed January 28, 1916. Serial No. 74,830.

To all whom it may concern."

Be it known that I, Roscon BEAN, a citizen of the United States, residing at Berea, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Valve-Refacers, of which the following is a specification, reference being had therein to the accompanying drawlng.

The invention relates to valve refacers and the like and is in the nature of a further development and improvement of the device shown and described in my co-pending application, Ser. No. 36,6 10, filed June 28, 1915. Owing to -the high temperature at which valves operate in some gas engines the surfaces of the same may harden and have deposited upon them carbon which causes great inconvenience. The usual cutting tool will not stand up to the work under such conditions. The valve must, therefore, be ground by some abrasive material before be ing refaced by the cutting tool.

It is an object of this invention to provide a tool which will perform either the abrasing or cutting, or both, of the valve face. It is a further object of the invention to provide adjustable and detachable means for the tool to support the valve and stem for finishing, whereby said means can be adapted to reductions in size of the stem due to the wear, thereby insuring a perfect alinement of the valve stem. Another object of the invention is to provide certain detail improvements in the cutting tool. I

In the accompanying drawings, Figure 1 is a vertical, sectional view of the tool showing the valve in position on the abrasin g end thereof; Fig. 2 is a vertical sectional view taken at right angles to the section shown in Fig. 1 and inverted; and Fig. 3 is a plan view of the tool looking down on Fig. 2.

In the embodiment of the invention here shown the tool comprises a frame member 1 with an abrasing device or disk 2 located at one end and a cutting device or disk 3 located at the other end. These disks 2 and 3 are mounted upon rings 4 and 5, respectively, located at the ends of the frame member 1. The frame member comprises a pair of members 6 and 7 connecting the two rings. Transverse connecting pieces 8 and 9 are located between the members 6 and 7. These connecting pieces 8 and 9 project beyond the members 6 and 7, as indicated at 8 and 9',

forming lugs between which the tool can be mounted in a vise when in use. The frame member comprising the rings 1 and 5, the members 6 and 7 and the connecting pieces 8 and 9, are integral and cast in one piece. It will be understood, however, that other constructions may be used. The transverse connecting pieces 8 and 9 have vertically extending apertures therein, as indicated at 10.

These apertures are tapered and screw threaded. A bushing 11 with an aperture 12 therein is located within each aperture 10. Each bushing comprises a tapered screwthreaded portion 13 with longitudinal slits or apertures 14 therein and a head 15. By this construction it will be seen that bushings having apertures of different sizes may be located within the apertures 10 and furthermore that the said bushings can be adjusted to increase and decrease the size of the aperture in each bushing, this adjustment being performed by means of a wrench or by the hand through the head 15. The abrasing disk 2 consists of substantially a frusto-conical shell having an opening'16 at its smaller end. The inner surface of this conical shell is adapted to be used as an abrasive medium, as indicated at 17 The large end of the shell has a horizontal circumferential flange thereon, indicated at 18, which is adapted to be detachably secured to the ring 5 by means of screws 19. The cutting disk 3 consists of substantially a frusto-conical shell having an opening 20 at its reduced end and a circumferential flange 21 located at its enlarged end. This flange 21 is detachably secured to the ring 5 by means'of screws 22.

The cutting disk 3 is made from sheet metal'of sufiiciently heavy gage to give the necessary rigidity and strength thereto and is preferably formed by the use of dies, al-- though it will be obvious that it could be formed by hand. The frusto-conical shell of the cutting disk is preferably struck from a flat sheet of metal. This cutting disk has portions 23 struck therefrom extending inwardly above the inner surface of the shell. These portions 23 are arranged circumferentially' on the inside of the frusto-conical shell 3, forming the cutters for the tool, and obliquely to the path of rotation of the valve face, thereby insuring a drawing out which renders the same very eflicient as to speed,

ease of operation and smoothness of finish,

The struck up portions 23 are formed by making a longitudinal slit 2a and two slits 25 and 26 at right angles to and at the ends of the slit 2a and bending the cut portion up. The struck up portion thus made it is evident will then comprise side edges 27 and 28 and a longitudinal edge 29, this edge constituting the cutting edge. As here shown, each struck up portion is substantially rectangular in configuration and the cutting edge is spaced some distance from the main portion of the frusto-conical shell. As stated above, the portions 23 are arranged obliquely to the path of rotation of the valve face or of the tool as it is innnaterial which is rotated. As will be seen from an inspection of Fig. 3 this obliqueness is such that when the plane of any struck-up portion is prolonged it will intersect the plane of a next succeeding struck-up portion, the line of intersection being located substantially on the sheet metal frusto-conical shell. A sample valve is indicated at 30 in Fig. 1, the valve face having any specified angle of inclination. The face is also conical in configuration. Inasmuch as each cutting edge 29 is located obliquely to the valve face and has a substantial width transversely it must be shaped to fit the curve of the said valve face, whereby the cutting edge both transversely and longitudinally thereof will squarely and completely engage the valve face. To obtain these results each edge, as shown, has a diagonal scoop therein whereby the corners 31 and 32 are higher than the corners 33 and 34. This scoop gives the cutting edge 29 a more or less longitudinal curve and a more or less transverse curve. The particular structure of the edge, as shown in the drawing, is more or less distorted to clearly bring out the point. The idea is to so shape the edge that it will squarely engage the valve face at all points across the same, whereby the valve face will be out smoothly and evenly and the cutting edge will engage the same firmly. It is to be understood, however, that these struck-up portions can be modified as to their shape, size and arrangement, whereby they may be adapted to valves having faces of different angles and to valves of different sizes. When the tool is to be used it is clamped within a vise with the abrasing surface 2 at the upper end thereof. The valve, as shown at 30, is then placed within the shell 2 with its stem extending through the opening 16 and through the apertures 12 of the bushings. The valve is then rotated until the rough projections caused by either usage or by carbon have been removed. The tool is then re versed with the cutting surface up, as shown in Fig. 2. The valve 30 is then placed within the conical shell 3 with its stem projecting throughthe opening 20 and through the apertures in the bushingsll. 'The valve is then rotated and finished. The valve stem is placed in proper alinement with the cutting tool by adjusting the bushings to make the fit between the apertures 12 thereof and the valve stem more or less close. In case the apertures within the bushings are not sufliciently large or are too large, the bush ings in use can be replaced by others of different sizes.

In connection with the above operations it will be understood that it will not be necessary in all cases to go through the abrasing operation and the tool can also be made without the abrasing part. It is contemplated to provide bushings of different sizes with each tool in order that the correct bushing can be placed within the tool when necessary. It will, therefore, be seen that I have provided a tool which is simple in construction and is adapted for a wide range of uses with valves of different sizes and with stems of different sizes. It will also be apparent that the finishing of the valve face by means of the above-described tool will be more complete and even. The tool is furthermore very easily operated and the valve can be easily and quickly refaced.

It is to be understood that the invention embodying the frusto-conical shell with "the struck-up portions is not to be limited tovalve refacers as it is contemplated, for instance, to use the invention in connection with valve seat refacers.

IVhile I have shown and described one embodiment of my invention it will be understood that this has been chosen for the purposes of illustration only and that I do not desire to be limited to the details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a valve refacer, a frame, an abrasin device and a cutting device mounted on said frame inspaced apart relation, and a bushing mounted on said frame betweensaid devices.

2. In a valve refacer, a frame comprising spaced apart rings connected by intermediate portions, a shell comprising an abrasing surface mounted on one ring and a shell comprising a cutting surface mounted on the other.

3. In a valve refacer, a frame, a frustoconical abrasing device mounted on said frame, a frusto-conical cutting device mounted on said frame, the smaller portions of said devices having openings therein, and a bushing located between said devices and alined with said openings.

4:. In a valve refacer, a frame, said frame having a tapered screw-threaded aperture therein, a iriIStO-GOniGal cutting deVice mounted on said frame, the reduced portion of said device having an opening therethrough and a bushing having means thereon to cooperate with said tapered screwthreaded aperture and located below to one side of said opening.

5. In a valve refacer, a frame comprising spaced apart rings, means for connecting said rings and a transverse connecting piece having an aperture, an abrasing device con- 10 mounted in said aperture between said de- 15 vices.

In testimony whereof I afiix my signature.

ROSCOE BEAN. 

